A British air stewardess accused of being a drug mule has insisted she is being set up as she remains locked in a Sri Lankan jail. Charlotte May Lee, a former TUI cabin crew member, was arrested in the capital, Colombo, last Monday after £1.2 million worth of cannabis was uncovered in her suitcase. Police discovered a synthetic strain of the drug and sent her to Negombo Prison, where she remains in her cell for 22 hours a day.

Lee, 21, has maintained her innocence since her arrest at Bandaranaike Airport, claiming the drugs were "planted" in her suitcase". She told : "I had never seen them before. I didn't expect it all when they pulled me over at the airport. I thought it was going to be filled with all my stuff.

"I had been in Bangkok the night before and had already packed my clothes because my flight was really early. So I left my bags in the hotel room and headed for the night out. As they were already packed, I didn't check them again in the morning. They must have planted it then. I know who did it."

The former stewardess from Coulsdon, South London, was working on a "booze cruise" in Thailand, but flew to Sri Lanka while she waited for her 30-day Thai visa to be renewed.

She explained: "I thought while I was waiting for the visa that I'd come to Sri Lanka. They [the people she thinks set her up] were supposed to meet me here. But now I'm here - stuck in this jail."

Lee was first held at the Police Narcotics Bureau for seven days, where she was forced to sleep on a sofa with bed bugs before being transferred to Negombo Magistrates Court.

The court ordered her to be remanded in custody for 14 days while awaiting further hearings and transferred her to Negombo Prison, where she has not been eating any food because it made her ill.

She told the outlet: "I am trying my best to stay positive because what else can you do? But it is hard. I feel as though I have no human rights here. There are no beds, no blankets. And where you sleep is like a long corridor with lots of other women.

"I am sleeping on a concrete floor - literally. All I have is my jumper as a pillow. There is a ceiling fan but it doesn't really work and there's a TV but that also barely works.

"I only have this one pair of clothes, nothing else to change into and I'm not being allowed my medication for ADHD. The only thing they give are sleeping tablets that properly knock you out.

"The shower is not really a shower, it's just a bucket that you pour over yourself but they don't give you anything for that ... You are only allowed two or three hours outside in the sun a day, occasionally longer if there are a lot of women in court that day."